{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-eu4ha9bt","versions":[{"created_at":"2026-06-13T17:24:12Z","element_count":90,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"5e01e6e440cfa73ff5f53d958ea75986b27b13b5b1b686862495a7ee5591d2be","version":3},{"created_at":"2026-06-13T17:18:31Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"295c6e26f20d000424b98c9c75c132614a3c31192843f44ce67c587a7ccc3076","version":2},{"created_at":"2026-06-13T17:18:31Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}